Audio processing apparatus
US8068620B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2008 |
| Grant date | Nov 29, 2011 |
| Priority date | — |
| Expiry date | Sep 30, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2410/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A signal processing apparatus includes sound collecting elements, a noise detector for detecting a level of noise in a low-frequency band of audio signals output from the sound collecting elements, a noise reduction unit for reducing the noise in the audio signals in accordance with a signal output from the noise detector, a converter for converting the audio signals output from the noise reduction unit into pieces of audio data corresponding to channels including a low-frequency channel and other channels, a low-frequency channel controller for controlling a level of the audio data corresponding to the low-frequency channel in accordance with the level of the noise detected using the noise detector, and a level controller for controlling the level of the audio data of the low-frequency channel output from the low-frequency channel controller and levels of the pieces of audio data corresponding to the other channels output from the converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.